Centrifugal cream-separator.



nio Srarns JOHN JOSEPH BERRIGAN, OF AVON, NEV YORK, ASSIGNOR TO rlIlE DELAVAL SEPARATOR COMPANY, OF NEV JERSEY.

CENTRIFUGAL CREAM-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 630,168, dated August1, 1899.

Application iiled November 14, 1898. Serial No. 696,359. (N0 model.)

To all whom l? may con/cern.'

Be itknown that I, JOHN JOSEPH BERRIGAN, a citizen of the UnitedStates,residing at Avon, county of Livingston, and State of New York,have invented a new and useful Improvement in CentrifugalLiquid-Separators,of which the following is a full, clear, and eXactdescrip-` tion, reference being had to the accompanying drawings, whichform a part of this speciication.

My invention relates to that class of centrifu gal liquid-separators inwhich there is in the liquid-space ofthe bowl a series of upright platesor blades which intersect the radial lines of the bowl. lVith this classof separators there is considerable difficulty encountered in providingfor a proper distribution of the incoming milk between the blades orplates. This decreases the efficiency and capacity of the bowl. Thedifficulty arises as follows: The incoming milk is forced to enter theblades through the cream-wall or from their upper or lower ends anddistribute itself downwardly or upwardly against the inward and outwardaction of centrifugal force.

The object of my invention is to provide means to evenly distribute theincoming milk throughout thelength and height of these blades and evenlyas to the different blades. I accomplish this in the following manner:The separator is provided with a central tubular shaft or core. I usethis shaft for the entry of the full milk, but close or nearly close thesame at its bottom, so that at most but a portion of the milk may escapetherefrom, and provide it with a spiral or semi-4 spiral apertureextending around it. By this means the incoming milk is fed into thespaces between the blades at a low point into some of them, graduallyhigher into others, and up to almost the top of still others, the. Aswill appear hereinafter, I do not intend to limit myself to anyparticular form of such shaft or core or any particular form ofscrew-like apertures or inlets used in the same. Thus, as will be seen,the inlet aperture or apertures may be cut in the intermediate wall ofthe shaft itself. In this case a greater part of the incoming milk Vwillpass through the cream-wall in process of separation. Instead of cuttingthe spiral aperture directly in the intermediate wall of the shaft theshaft may be provided with a projecting flange spiral in form, in'whichand the wall of the shaft the inlet aperture or apertures may be cut. Inthis case the flange may project sufficiently to carry the inlet beyondthe cream-wall, and thus the new milk will be delivered into the neutralZone-a decided advantage.

I will now describe the embodiment of my invention as illustrated in theaccompanying drawings.

Figure l is a plan view of the bowl and platesv with the cover removed.Fig. 2 is a section on the line 2 2 of Fig. l. Figs. 3 and 4t are viewssimilar to Fig. 2 of modified form.

A is the bowl of a centrifugal liquid-separator adapted for theseparation of milk; a, the cream-outlet; b, the skim-milk outlet.

B are a series of upright blades or plates intersecting the radial lineof the bowl in the liquid-space of the bowl.

C is atubular shaft. In Figl there is shown a spiral or screw-likeaperture c extending from top to bottom of this shaft, the tubular shaftbeing closed at the bottom, although in practice if itis nearly closed,so Vthat but a small portion of the milk may escape there from, it willbe sufficient. The milk is fed into this tubular shaft and escapesthrough the spiral aperture. This' spiral aperture may be, as shown inFig. 1,'a continuous apA erture, or, as shown in Fig. 3, made up of aseries of orifices. As may be seen in this form the full milk deliveredinto the bowl has to pass through the cream-wall in process o fseparation. 1

In Fig. 4 I have shown a construction in which a spiral or screw-likeflange F projects from the tubular shaft, and through this and the innerwall of the shaft is cut th'e aperture. In this construction in order toform .a channel'or passage for the cream to its discharge-outlet Iprovide a flange F', depending from the flange F.

Vhereverin the claims I use the term apL erture, I intend to includeboth a continuous aperture and one formed by a series of orifices.

Having now fully described my invention, what I claim, and desire toprotect by Letters Patent, is-

IOO

1. In a centrifugal liquid-separator, in combination with abowl providedwith a plurality of upright plates, of a tubular shaft provided with anaperture extending from the interior to the exterior of said shaft, andextending spirally around and along said shaft.

2. In a'ceutrifugal liquid-separator, in combination with a plurality ofupright plates, of a tubular shaft provided with an outwardlyprojeotingflange, said flange extending spirally around and along the periphery ofsaid shaft, there being an aperture out through said flange and the wallof the tubular shaft, the aperture conforming in direction to the spirallange.

3. In a centrifugal liquid-separato r, in oombiuation with a pluralityof upright plates, of

JOHN JOSEPH BERRIGAN.

Witnesses:

CEAS. COBB VAN RIPER, M. F. ELLIS.

